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公开(公告)号:US09455744B2
公开(公告)日:2016-09-27
申请号:US14108132
申请日:2013-12-16
Applicant: GE Video Compression, LLC
Inventor: Valeri George , Benjamin Bross , Heiner Kirchhoffer , Detlev Marpe , Tung Nguyen , Matthias Preiss , Mischa Siekmann , Jan Stegemann , Thomas Wiegand
CPC classification number: H04N19/13 , H03M7/42 , H04N19/124 , H04N19/132 , H04N19/174 , H04N19/184 , H04N19/50 , H04N19/513 , H04N19/52 , H04N19/61 , H04N19/70 , H04N19/91
Abstract: A decoder includes an entropy decoder configured to derive a number of bins of the binarizations from the data stream using binary entropy decoding by selecting a context among different contexts and updating probability states associated with the different contexts, dependent on previously decoded portions of the data stream; a desymbolizer configured to debinarize the binarizations of the syntax elements to obtain integer values of the syntax elements; a reconstructor configured to reconstruct the video based on the integer values of the syntax elements using a quantization parameter, wherein the entropy decoder is configured to distinguish between 126 probability states and to initialize the probability states associated with the different contexts according to a linear equation of the quantization parameter, wherein the entropy decoder is configured to, for each of the different contexts, derive a slope and an offset of the linear equation from first and second four bit parts of a respective 8 bit initialization value.
Abstract translation: 解码器包括熵解码器,其被配置为根据数据流的先前解码部分,根据数据流的先前解码部分,通过使用二进制熵解码从不同上下文中选择上下文并更新与不同上下文相关联的概率状态,从数据流中导出二进制数的二进制数 ; 配音器,被配置为对语法元素的二进制化进行修饰以获得语法元素的整数值; 重建器,被配置为使用量化参数基于所述语法元素的整数值来重构所述视频,其中所述熵解码器被配置为区分126概率状态,并且根据线性方程式来初始化与所述不同上下文相关联的概率状态 所述量化参数,其中所述熵解码器被配置为针对所述不同上下文中的每一者,导出所述线性方程与相应8位初始化值的第一和第四四位部分的斜率和偏移。